Marine VHF Channel Guide – Online Quick Reference by Region
Select region (US, Canada, International) and see channel frequencies and usage (distress, bridge). Boating safety.
UD5 Toolkit
Never miss the safe introduction date. Track all your new arrivals in one place.
No fish in quarantine yet. Add your first newcomer above!
Select region (US, Canada, International) and see channel frequencies and usage (distress, bridge). Boating safety.
Log your daily water consumption with one click. Set a goal and track progress. Data stored locally for privacy. Simple and clean interface.
Set a meditation duration with optional interval chimes. Soothing bell sounds at the start and end. No ads.
Browse a collection of common bird calls. Play short audio samples to identify birds you hear. Educational static data.
Interactive checklist to build an emergency go-bag. Covers water, food, first aid, tools, documents. Track progress locally. Essential for disaster preparedness.
See current time in multiple pre-selected cities simultaneously with day/night indicators. No tracking, just a simple multi-clock.
Hear a common bird song and choose the correct species from multiple choices. Ear training for birders.
Select cities and see a 24-hour grid highlighting compatible meeting times. Drag to find a slot that works for everyone. Daylight saving aware.
Display current time for multiple cities worldwide. Add and remove locations. See day/night indicator. Lightweight and always accurate.
Set a timer that reminds you to take a break, stretch, or follow the 20‑20‑20 rule. Desktop notification supported. Runs offline.
Play random Morse characters at configurable speed. Learn with Koch or Farnsworth method.
Record audio from your microphone and save as WAV file. Visual waveform while recording. Simple and privacy-friendly; audio stays in your browser.
Full scientific calculator with history tape, memory keys, and unit conversions. All in your browser, no install.
Write a short note and set a specific time for a browser notification reminder. Great for quick one‑offs. Local.
A complete reference of HTTP status codes with explanations. Search and filter by code or category. Useful for API developers and web debugging. Static and fast.
Enter a registration (e.g., N123AB) and convert to the standard phonetic callsign. Aviation enthusiast tool.
Look up any HTTP status code and see its meaning, RFC reference, and example. Full offline reference.
Choose your main activity (driving, fishing, skiing) and get the best lens tint color and VLT recommendation.
Enter hiding places and get a set of rhyming clues to print. Fun for kids' parties.
See the current UV index forecast or enter a value to learn protection needed (SPF, hat, shade). Educational.
A sequence of digits flashes for a few seconds. Type it back. Increase length. Improve your working memory.
Record a tick bite date and daily symptoms. Visual timeline to share with doctor. Private and local.
Modify the DOM via buttons and see MutationRecords logged. Understand childList, attributes, and subtree options.
Paste email headers or body text to quickly spot phishing signs, suspicious domains, and obfuscated links. Educational and private.
Shows a random historical event that occurred on today's date. Fun daily knowledge snippet.
Paste a sentence and see each word tagged with its part of speech (noun, verb, adjective). Local rule‑based analysis.
Play standard emergency whistle patterns (SOS, three blasts) using Web Audio. Learn signals for outdoor safety. Offline capable after load.
Drop a WAV file and see its full header: sample rate, bit depth, channels, and chunk structure. Raw bytes explained.
Strip dangerous HTML tags and attributes (scripts, onclick) to prevent XSS attacks. Safe iframe preview. Local sanitation engine.
Get a random history fact or see what major events happened on this day. Curated from public domain sources. Local.